Malicious PDF — malware analysis report

Static analysis result for SHA-256 e32909023b721f2e…

MALICIOUS

PDF

84.6 KB Created: 2021-08-14 09:31:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: d6188b96ffb1eda182bee10588749654 SHA-1: e6b0dcca96713348de4ba82788a0105431e6a9f6 SHA-256: e32909023b721f2e4bd7a25282dc43874585129dd3e68d3c14a6398bf65d2617
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to compromised WordPress uploads or disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The presence of these links indicates an attempt to lure users to external malicious sites, likely as part of a phishing campaign or to deliver further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://urgentcarepb.net/userfiles/file/jojokat.pdf In PDF document text
    • http://sterenstein.ru/userfiles/file/kegimonox.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/82c62db19ede5e8662501488d6a63a44/47083218674.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f14ec439ac---53670537292.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/vizagavutafixelogemodi.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607020132804f---80084424067.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609262787ed5d---89923815643.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e80abb465---56691475775.pdfIn PDF document text
    • http://alexsrmenchion.com/clients/b/bf/bf5401b25fe3457642f5a6f1150d5537/File/motafisiradalasir.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/2248ae1f80fd90932c12a8c427c54ec2/wewutefilosusagas.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/506f6029fc8a50eac07590ae2f1d72e4/gelatudivogirawura.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160fec3d3022b8---zubogofuf.pdfIn PDF document text
    • http://aias.pnu.ac.th/ckfinder/userfiles/files/migulozuvuwuzi.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/83915534998.pdfIn PDF document text
    • https://noddy.nu/images/file/40692289157.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/zavimafamexemipinufosa.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f43cf12d11---97953887424.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/290d349e13bdac84d4f25d20876ab18e/mazunaruti.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/wekofub.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/deluwipidil.pdfIn PDF document text
    • http://builderall.info/userfiles/file/noferefuzapalalevuxiwow.pdfIn PDF document text
    • http://artdental.hu/editor_up/xeverowopujasebebakego.pdfIn PDF document text
    • http://digitaldaya.com/imagenes/file/19085458591.pdfIn PDF document text
    • http://aimic.com/userfiles/file/96463746451.pdfIn PDF document text
    • http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/wosanitijinovazekike.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/ka3dkutr3gtf9lbtagaanavf09/41104554871.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=le+mammouth+et+la+ch%C3%A2taigne+questionnairePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CB 17712 bytes
SHA-256: babf9ef54d743670c513ff7170cda5b3ebc4540c584828265ed5d3d8451f6a17
font_01_sfnt_off000110ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C2 11068 bytes
SHA-256: 1cab20aead046a76dbfcc86cf21804b7a7bb83fb943e82d1c0d507bc1dd0c535

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